How to know if my computer is using EFI/UEFI or BIOS firmware interface

1.Symptoms

I am not able to migrate Windows 8 or Windows 7 PC into a virtual machine using Parallels Transporter. Migration fails on detecting the Operating System type.

Cause

Most probably your PC has GPT partition on the hard drive and is using EFI/UEFI instead of BIOS.

Resolution

Parallels Desktop currently does not support migrating computers with GPT partitions and EFI/UEFI.

To determine whether your PC is using BIOS or EFI/UEFI please follow the steps below:

1. Start your PC
2. Go to Start > Computer
   
3. Navigate to C:\Windows\Panther\setupact.log
   
4. Open setupact.log
5. Search for this string:

   Callback_BootEnvironmentDetect: Detected boot environment:
   

   It should tell us the boot environment: BIOS or UEFI:

   Code:Callback_BootEnvironmentDetect: Detected boot environment: BIOS
   Code:Callback_BootEnvironmentDetect: Detected boot environment: UEFI
   

In Windows 8, Windows 8.1,Windows 10  if the setupact.log file missing in the Panther folder, we can check the Boot Environment using the following steps :

1. Press Win + R > type msinfo32 and press Enter
2. Look for the BIOS Mode entry  UEFI Mode or Legacy Mode
3. If the entry is present as Legacy then its BIOS, otherwise the respective Boot Environment will be listed

2.

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